[PATCH] octeontx2-pf: Add check for non zero mcam flows
From: Subbaraya Sundeep <sbhatta@marvell.com>
Date: 2021-08-20 08:17:52
Subsystem:
marvell octeontx2 physical function driver, networking drivers, the rest · Maintainers:
Sunil Goutham, Geetha sowjanya, Ratheesh Kannoth, Subbaraya Sundeep, Bharat Bhushan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Sunil Goutham <sgoutham@marvell.com> This patch ensures that mcam flows are allocated before adding or destroying the flows. Signed-off-by: Sunil Goutham <sgoutham@marvell.com> Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com> --- drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c | 9 +++++++++ drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 16 ++++++++++++++++ 2 files changed, 25 insertions(+)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
index 2a25588..55802b5 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c@@ -972,6 +972,12 @@ int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc) int err = 0; u32 ring; + if (!flow_cfg->max_flows) { + netdev_err(pfvf->netdev, + "Ntuple rule count is 0, allocate and retry\n"); + return -EINVAL; + } + ring = ethtool_get_flow_spec_ring(fsp->ring_cookie); if (!(pfvf->flags & OTX2_FLAG_NTUPLE_SUPPORT)) return -ENOMEM;
@@ -1183,6 +1189,9 @@ int otx2_destroy_ntuple_flows(struct otx2_nic *pfvf) if (!(pfvf->flags & OTX2_FLAG_NTUPLE_SUPPORT)) return 0; + if (!flow_cfg->max_flows) + return 0; + mutex_lock(&pfvf->mbox.lock); req = otx2_mbox_alloc_msg_npc_delete_flow(&pfvf->mbox); if (!req) {
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 7dd56c9..6fe6b8d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c@@ -1860,6 +1860,22 @@ static int otx2_set_features(struct net_device *netdev, if ((changed & NETIF_F_NTUPLE) && !ntuple) otx2_destroy_ntuple_flows(pf); + if ((changed & NETIF_F_NTUPLE) && ntuple) { + if (!pf->flow_cfg->max_flows) { + netdev_err(netdev, + "Can't enable NTUPLE, MCAM entries not allocated\n"); + return -EINVAL; + } + } + + if ((changed & NETIF_F_HW_TC) && tc) { + if (!pf->flow_cfg->max_flows) { + netdev_err(netdev, + "Can't enable TC, MCAM entries not allocated\n"); + return -EINVAL; + } + } + if ((changed & NETIF_F_HW_TC) && !tc && pf->flow_cfg && pf->flow_cfg->nr_flows) { netdev_err(netdev, "Can't disable TC hardware offload while flows are active\n");
--
2.7.4